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Jul
22
comment How can I learn to “read maths” at a University level?
You are free to disagree with me, but you need to be objective. Someone who studies computer science does not have the luxury to spend days/weeks reading math books. You need to use shortcuts, and sometimes those shortcuts work very well, and later on, you even start to understand the concepts. Since you seem to believe that my initial struggle with linear algebra had something to do with fractions, I tell you, I did not have any problem with any aspect of elementary maths back then. It was just something which became clear later.
Jul
21
comment How can I learn to “read maths” at a University level?
I don't get your objection.
Jul
10
awarded  Favorite Question
Jul
2
awarded  Good Answer
Jul
2
awarded  Popular Question
Jun
30
answered What is the 'optimal' equal-area partition of a circle?
Jun
24
awarded  Popular Question
Jun
23
awarded  Nice Answer
Jun
19
awarded  limits
Jun
16
comment Linear algebra: Proving uniqueness and existence of a function
I do not have the time right now to write an answer. Look at the Gramm-Schmidt process. In that process the initial operations are only operations of type 2) , so there is no change in the value of the function. Changes come when you normalize, whcih is an operation of type 3). If you write things down and use 4, you get an explicit formula, which gives unicity.
Jun
16
comment Linear algebra: Proving uniqueness and existence of a function
You're probably on the right track with that function. The hints are valid though. You can prove existence and uniqueness by using the properties given without using the determinant. In fact, this is now one can prove that the function determinant exists without really writing the formula.
Jun
5
comment Proof of $\sum_{x = 1}^\infty \frac{1}{x}$'s divergence by absurdity?
Yes, the proof is valid (as far as I can tell). The only troubling part is the rearrangement of the terms of a series, grouping and splitting, which cannot be done in general. But assuming convergence, you have, in fact, absolute convergence, and the operations you make are valid.
Jun
5
answered Proof of $\sum_{x = 1}^\infty \frac{1}{x}$'s divergence by absurdity?
Jun
1
comment How many 3 digit even numbers can be formed by using digits 1,2,3,4,5,6,7 ,if no digits are repeated
That depends on how you look at things. :)
Jun
1
answered How many 3 digit even numbers can be formed by using digits 1,2,3,4,5,6,7 ,if no digits are repeated
May
27
accepted Simpler proof - Non atomic measures
May
26
awarded  Popular Question
May
17
comment Is Lipschitz's condition necessary for existence of unique solution of an I.V.P.?
Continuity alone is not sufficient. Continuity plus two different solutions give an infinity of solutions. Think that $f$ Lipschitz (which is continuous) implies unique solution.
May
17
comment Show that $ \int_{-\infty}^{\infty} \frac{x^3}{(x^2+4)(x^2+1)}\, dx$ does not converge
If $a=b$ you integrate an odd function on $[-a,a]$ so you get $0$.
May
16
comment Is Lipschitz's condition necessary for existence of unique solution of an I.V.P.?
I do not get the question regarding the sufficiency. Can you please detail what you mean?